Sherlen has a different and very effective feedback service for TOEFL students who need more feedback to improve their weaknesses in writing.
Getting feedback on essays from time to time without intensive focus WILL NOT fix your fossilized mistakes and improve your English proficiency.
You know writing strategies and templates to write an effective essay. You can apply the templates with success.
You realize that you need more practice with feedback to improve your English proficiency and erase fossilized mistakes to get your required scores.
You understand getting random feedback from time to time is not effective. You want to improve your weaknesses fast with the support of an exam coach.
Getting random feedback from time to time without intensive focus on the solutions will not fix your fossilized mistakes and improve your English proficiency.
Then, in each essay, she will check to see if there is progress in topic development, coherence, and grammar. If she doesn't see the progress, she will assign more skill-building practice to fix the weaknesses.